Some anomalies resolved in colloid mobility by electrodeposition analysis: depletion versus turbulence

Influence of Biofilms on Colloid Mobility in the Subsurface

Colloidal Transport in Porous Media ◽

10.1007/978-3-540-71339-5_6 ◽

2007 ◽

pp. 143-173 ◽

Cited By ~ 4

Author(s):

Martin Strathmann ◽

Carlos Felipe Leon-Morales ◽

Hans-Curt Flemming

Keyword(s):

Colloid Mobility

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U, Th, Eu and colloid mobility in a granite fracture under near-natural flow conditions

Radiochimica Acta ◽

10.1524/ract.92.9.731.54975 ◽

2004 ◽

Vol 92 (9-11) ◽

Cited By ~ 33

Author(s):

Thorsten Schäfer ◽

Horst Geckeis ◽

Muriel Bouby ◽

Thomas Fanghänel

Keyword(s):

Flow Velocity ◽

Test Site ◽

Swiss Alps ◽

Flow Conditions ◽

Grimsel Test Site ◽

Natural Flow ◽

Core Migration ◽

Colloid Mobility

SummaryLaboratory core migration experiments were performed in a granite fracture from the Grimsel Test Site (GTS, central Swiss Alps). The flow velocity was varied (46 m yr

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Impact of Ionic Strength on Colloid Mobility in Saturated And Unsaturated Porous Media

MRS Proceedings ◽

10.1557/proc-556-737 ◽

1999 ◽

Vol 556 ◽

Author(s):

A. P. Gamerdinger ◽

D. I. Kaplan ◽

J. H. H.

Keyword(s):

Ionic Strength ◽

Yucca Mountain ◽

Deionized Water ◽

Flow Conditions ◽

Steady State Flow ◽

J 13 ◽

Colloid Retention ◽

Moisture Conditions ◽

Colloid Mobility ◽

Water Contents

AbstractA model system consisting of well-characterized quartz sand, negatively charged carboxyl-modified latex microspheres, and synthetic J- 13 groundwater was used as a first-step in defining limiting conditions for colloid transport at the proposed Yucca Mountain Repository for radioactive waste. Colloid (280-nm diameter) and tracer (bromide) transport was determined using column methods under steady-state flow conditions for both saturated and unsaturated moisture conditions. Experiments were conducted at three water contents (13%, 70%, and 100% saturated) and four ionic strengths (deionized water, and 0.1 x, 1x, and 10x the ionic strength of J-13 groundwater, which has an ionic strength of 0.0116). Colloid mobility in the 13% saturated columns was appreciably less than in the 70% and 100% saturated columns, whereas colloid mobility in the 70% and 100% saturated columns were quite similar. Ionic strength had a significant impact on colloid retention, becoming more pronounced in the drier systems. Colloids were mobile in deionized water and the 0.1x J-13 groundwater. Retention was approximately 20% in lx J-13 groundwater and 100% in the 10x J-13 groundwater. Compared with the 70% and 100% saturated conditions, colloid mobility decreased for the 10% saturated condition, with greater than 50% retention for the 1x J-13 groundwater system. As observed for the 70% and 100% saturated conditions, colloids in the 10x J-13 solution were essentially immobile. Colloid mobility is greatly affected by the ionic strength of the soil solution and this effect is moisture saturation dependent.

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